Helion logo — Building the world's first fusion power plant

Helion

Building the world's first fusion power plant

Founded 2013 United States Everett, United States 535 employees Series G Total: $1.47B ESG, Energy +1

General Information

Company Name Helion
Founded Year 2013
Location United States Everett, United States
Employees 535
Industries ESG, Energy, Renewable Energy
Funding Stage Series G
Business Model B2B, B2G
Revenue Model Usage Based, Pay As You Go, Value Based Pricing
Social

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About Helion

Helion, founded in 2013, is ambitiously pursuing the development of the world's first fusion power plant. Headquartered in Everett, WA, this pioneering company operates at the intersection of ESG, Energy, and Renewable Energy sectors. Their mission: to deliver unlimited, clean electricity worldwide, epitomized by their slogan, "Building the world's first fusion power plant."

Since inception, Helion has successfully attracted over $1 billion in investments from both seasoned and new investors, including notable names like Sam Altman, Mithril, Capricorn Investment Group, SoftBank, and Lightspeed. They reached a significant milestone with their last prototype, Trenta, which achieved temperatures of 100 million degrees Celsius. Currently, efforts are focused on Polaris.

With a recent significant investment of $425.00M by Sam Altman and Microsoft as of January 2025, Helion continues to be a compelling investment opportunity poised to transform the energy landscape with its groundbreaking technology.

Business keywords: Fusion Energy, Clean Electricity, Zero-Carbon Power, High Voltage, Plasma Physics, Energy Technology, Sustainable Power, Electrical Engineering, Mechanical Engineering, Scientific Research, Prototype Development, Energy Innovation, Renewable Energy Solutions, Technology Commercialization, Energy Infrastructure

Services & Products

Fusion Power Plant Development
Electricity Production Technology
Energy Solutions

Target Customers

Energy Sector Companies Sustainable Practitioners Investors in Renewable Energy Advanced Technology Innovators

Funding Rounds & Investors (9)

View All
Funding Stage Amount Investors Lead Investors Date
Series G 465.00M 9
BoxGroup, Lightspeed Venture Partners +7
05 Jun 2026
Not Funded/Unknown $425.00M 2
Sam Altman, Microsoft
28 Jan 2025
Series E $500.00M 4
Mithril Capital, Capricorn Investment Group +2
05 Nov 2021
Series D $40.00M 1
Dustin Moskovitz
01 Jan 2020
Series C $10.00M 1
Capricorn Investment Group
01 Jan 2019
Series B $21.26M 2
Mithril Capital, Capricorn Investment Group
01 Jan 2016
Grant $5.00M 1
ARPA-E
01 Oct 2015
Series A Undisclosed -
06 Jul 2015
Seed Round $1.50M 3
Y Combinator, Mithril Capital +1
14 Aug 2014

Helion Alternatives & Competitors

View All Alternatives
Helion vs
Thea Energy
Thea Energy United States

Breakthrough fusion technology designed for operation and scale.

Non Equity Assistance
92 employees
Energy, Renewable Energy
Helion vs
Horne Technologies
Horne Technologies United States

Practical Fusion

Series A
8 employees
Energy, Renewable Energy
Helion vs

Fusion technology that stabilizes plasma with sheared flows for efficient and economical power gener...

Venture round
51-200 employees
Energy, Renewable Energy

FAQ About Helion

Building the world's first fusion power plant
Helion was founded in 2013.
Helion is headquartered in Everett, United States.
Helion operates in ESG, Energy and Renewable Energy. Its work centres on Fusion Energy, Clean Electricity, Zero-Carbon Power and High Voltage. Its customers include Energy Sector Companies, Sustainable Practitioners and Investors in Renewable Energy.
Helion has a B2B and B2G business model. Its revenue comes from Usage Based, Pay As You Go and Value Based Pricing.
Helion has approximately 535 employees.
Helion has completed 9 funding rounds, raising a total of $1.47B. The latest funding stage is Series G.
Helion offers: Fusion Power Plant Development, Electricity Production Technology, Energy Solutions.
Top alternatives and competitors to Helion include Thea Energy, Horne Technologies, Zap Energy, Ore Energy, Enapter. These companies operate in related industries and serve comparable markets. You can compare them side by side on Bounce Watch.
Helion and Thea Energy are both companies in similar industries. Compare their funding, team size, growth signals, and market position on Bounce Watch to see which one fits your needs.

Source: BounceWatch company record for Helion, https://bouncewatch.com/company/helion, updated 5 June 2026. When citing, please name BounceWatch and link this page.

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